PPRuNe Forums - View Single Post - Boeing 737 Max Software Fixes Due to Lion Air Crash Delayed
Old 6th Apr 2019, 22:59
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Join Date: Jun 2009
Location: florida
Age: 81
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Salute!

There are some disturbing comments from Boeing at the "briefing" the other day;

https://leehamnews.com/2019/03/27/boeing-presents-mcas-fix-to-pilots-regulators-and-med

1) I do not know what is "non-normal" activation of MCAS.
2) I do not understand the "reset" of MCAS. The briefing says a one time activation until the triggering data activates again. Well, duhhhh. The Lion crew had the triggering event continuosly and HAL did his job by moving the stab unless the pilot used manual electric trim.

Some of the "good" ponts of Boeing's brief admitted problems with the manual trim authority. And I have seen several posts here and on other blogs that the aero forces and control column logic can result in a "frozen" stab or stab trim motor. GASP!!

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